为什么这个功能不能正常工作？

Question

我不明白为什么 auto_clock() 功能可以正常工作，但 clock_time_add() 功能。第一个函数会打印出 1、2、3 中的一列列表，...这是预期的，而第二个函数只会打印出一列零。

这是第一个函数的输出：

这是第二个的输出：

这是代码：

import time

def auto_clock():
    second, minute, hour, day = -1, 0, 0, 1
    while True:
        second += 1
        time.sleep(1) 
        if second == 60:
            second = 0
            minute += 1        
        if minute == 60:
            minute = 0
            hour += 1
        if hour == 24:
            hour = 0
            day += 1
        time_clock = [day, hour, minute, second]
        return time_clock

def clock_time_add():
    while True: 
        time_clock = auto_clock()
        print(time_clock)
clock_time_add()

Answer 1

请考虑第一个函数中的 while 循环没有任何意义，因为 return time_clock 意味着它将在第一次迭代时退出。缩进在 Python.

中很重要

在 time_clock_add 中，您通过单次迭代一遍又一遍地调用 auto_clock，起始点相同，因此每次都会打印相同的内容。

Answer 2

在第二个函数中，您没有在一秒钟后传递更新的值。这就是为什么使用相同的 second、minute、hour 和 day 值调用第一个函数的原因。

我已更新代码以将更新后的值传递给第一个函数。

import time


def auto_clock(second, minute, hour, day):
    second += 1
    if second == 60:
        second = 0
        minute += 1
    if minute == 60:
        minute = 0
        hour += 1
    if hour == 24:
        hour = 0
        day += 1
    return second, minute, hour, day


def clock_time_add():
    second, minute, hour, day = 0, 0, 0, 1
    while True:
        second, minute, hour, day = auto_clock(second, minute, hour, day)
        print([day, hour, minute, second])
        time.sleep(1)


clock_time_add()

前 100 条记录的输出：

[1, 0, 0, 1]
[1, 0, 0, 2]
[1, 0, 0, 3]
[1, 0, 0, 4]
[1, 0, 0, 5]
[1, 0, 0, 6]
[1, 0, 0, 7]
[1, 0, 0, 8]
[1, 0, 0, 9]
[1, 0, 0, 10]
[1, 0, 0, 11]
[1, 0, 0, 12]
[1, 0, 0, 13]
[1, 0, 0, 14]
[1, 0, 0, 15]
[1, 0, 0, 16]
[1, 0, 0, 17]
[1, 0, 0, 18]
[1, 0, 0, 19]
[1, 0, 0, 20]
[1, 0, 0, 21]
[1, 0, 0, 22]
[1, 0, 0, 23]
[1, 0, 0, 24]
[1, 0, 0, 25]
[1, 0, 0, 26]
[1, 0, 0, 27]
[1, 0, 0, 28]
[1, 0, 0, 29]
[1, 0, 0, 30]
[1, 0, 0, 31]
[1, 0, 0, 32]
[1, 0, 0, 33]
[1, 0, 0, 34]
[1, 0, 0, 35]
[1, 0, 0, 36]
[1, 0, 0, 37]
[1, 0, 0, 38]
[1, 0, 0, 39]
[1, 0, 0, 40]
[1, 0, 0, 41]
[1, 0, 0, 42]
[1, 0, 0, 43]
[1, 0, 0, 44]
[1, 0, 0, 45]
[1, 0, 0, 46]
[1, 0, 0, 47]
[1, 0, 0, 48]
[1, 0, 0, 49]
[1, 0, 0, 50]
[1, 0, 0, 51]
[1, 0, 0, 52]
[1, 0, 0, 53]
[1, 0, 0, 54]
[1, 0, 0, 55]
[1, 0, 0, 56]
[1, 0, 0, 57]
[1, 0, 0, 58]
[1, 0, 0, 59]
[1, 0, 1, 0]
[1, 0, 1, 1]
[1, 0, 1, 2]
[1, 0, 1, 3]
[1, 0, 1, 4]
[1, 0, 1, 5]
[1, 0, 1, 6]
[1, 0, 1, 7]
[1, 0, 1, 8]
[1, 0, 1, 9]
[1, 0, 1, 10]
[1, 0, 1, 11]
[1, 0, 1, 12]
[1, 0, 1, 13]
[1, 0, 1, 14]
[1, 0, 1, 15]
[1, 0, 1, 16]
[1, 0, 1, 17]
[1, 0, 1, 18]
[1, 0, 1, 19]
[1, 0, 1, 20]
[1, 0, 1, 21]
[1, 0, 1, 22]
[1, 0, 1, 23]
[1, 0, 1, 24]
[1, 0, 1, 25]
[1, 0, 1, 26]
[1, 0, 1, 27]
[1, 0, 1, 28]
[1, 0, 1, 29]
[1, 0, 1, 30]
[1, 0, 1, 31]
[1, 0, 1, 32]
[1, 0, 1, 33]
[1, 0, 1, 34]
[1, 0, 1, 35]
[1, 0, 1, 36]
[1, 0, 1, 37]
[1, 0, 1, 38]
[1, 0, 1, 39]
[1, 0, 1, 40]

为什么这个功能不能正常工作？

Why does this function not work properly?

python

python-3.x